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HV100 Inhibitor is a general purpose treatment for the protection against scale and corrosion in all types of indirect central heating systems. Once the correct amount of HV100 has been added, it remains in the system indefinitely, providing ongoing protection. Depletion only occurs by dilution, e.g. when the system is topped up after removing, emptying and then re-connecting radiators during house decorating. It ensures optimum boiler efficiency and prevents boiler noise while preventing the formaation of hydrogen gas.